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        第六周作业
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      1. According to the von Neumann architecture, List basic parts of a computer. 控制器、运算器、存储器、输入设备、输出设备。
2. A computer has 64 MB (megabytes) of memory. How many bits are needed to address any single byte in memory? 64 MB = 226,
226/22 = 224，
so it needs 24 bits.
3. List basic parts of a CPU, include cache or not? 运算逻辑部件、寄存器部件、控制部件。
有缓存。
4. What mean secondary storage. List some on your PC. 辅助储存器是指除计算机内存及CPU缓存以外的储存器，此类储存器一般断电后仍然能保存数据。
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        第五周作业
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      1.Give the three representations of an AND gate and say in your words what AND means. Ⅰ. Boolean expressions： Y = AB
Ⅱ. logic diagrams： Ⅲ. truth tables： 与门：当所有输入都为1是，输出才是1，否则输出0。
2.Give the three representations of an XOR gate and say in your words what XOR means. Ⅰ. Boolean expressions： Y = (¬XY)+(X¬Y)
Ⅱ. logic diagrams： Ⅲ. truth tables： 异或门：当两个输入不相等时输出1，相等时输出0。
3.Draw a circuit diagram corresponding to the following Boolean expression: (A + B)(B + C) 4.
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        以Construct 3制作平台制作射击小游戏
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      什么是construct 3？ construct 3是一个十分简单的游戏创作平台，专门为2D游戏设计，即使是小白也能在这个平台上创作出十分有趣的小游戏。 
如何用construct 3只做一个简单的射击小游戏？ 首先，新建一个项目。

然后，双击白板，选择“平铺背景”，点击白板，然后选择从文件中选择你自己的背景，然后关闭。
这是我选择的背景：
接下来添加各种需要的元素，鼠标、战斗机、子弹、怪物、爆炸、文本、图层等，并根据需要添加他们的行为。
最后就是添加事件和行为了。
效果图 PS 附上我发在B站上的演示视频：震惊！某菜鸡竟然做了游戏并把自己玩疯！
试玩这个小游戏：Bian&rsquo;s Shooting
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        第四周作业
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      ASCII ASCII, abbreviated from American Standard Code for Information Interchange, is a character encoding standard for electronic communication. ASCII codes represent text in computers, telecommunications equipment, and other devices. Most modern character-encoding schemes are based on ASCII, although they support many additional characters. 
Color Color (American English), or colour (Commonwealth English), is the characteristic of visual perception described through color categories, with names such as red, orange, yellow, green, blue, or purple.
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        第三周作业Ⅱ
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      Method of complements In mathematics and computing, the method of complements is a technique to encode a symmetric range of positive and negative integers in a way that they can use the same algorithm (hardware) for addition throughout the whole range. For a given number of places half of the possible representations of numbers encode the positive numbers, the other half represents their respective additive inverses. The pairs of mutually additive inverse numbers are called complements.
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        第三周作业Ⅰ
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      1.  x = 01000011; //无错误y = 10000111; //无错误z = 11001010; //无错误2.  x = 11010011; //溢出，211(10)3.  x = 11010011; //无符号数未溢出，无错误4.  x = 01111111; //无错误y = 10000111; //无错误z = 10000110; //溢出，-134(10)5.  x = 0001.0010; //无错误6.  x = 00010111; //无错误7.  x = 0.0111001100110011...; //出现精度误差
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        名词解释Ⅱ
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      Information Information can be thought of as the resolution of uncertainty; it is that which answers the question of &ldquo;What an entity is&rdquo; and thus defines both its essence and nature of its characteristics. The concept of information has different meanings in different context.
Positional notation Positional notation (or place-value notation, or positional numeral system) denotes usually the extension to any base of the Hindu–Arabic numeral system (or decimal system). More generally, a positional system is a numeral system in which the contribution of a digit to the value of a number is the product of the value of the digit by a factor determined by the position of the digit.
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        名词解释Ⅰ
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      Computer A computer is a machine that can be instructed to carry out sequences of arithmetic or logical operations automatically via computer programming. Modern computers have the ability to follow generalized sets of operations, called programs. These programs enable computers to perform an extremely wide range of tasks. A &ldquo;complete&rdquo; computer including the hardware, the operating system (main software), and peripheral equipment required and used for &ldquo;full&rdquo; operation can be referred to as a computer system.
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